The influenza virus hemagglutinin (HA) mediates both receptor (glycan) binding and membrane fusion for cell entry and has been the basis for subtyping influenza viruses. The oligoribonucleotides-d-mannitol (ORNs-d-M) complexes possess an anti-influenza activity in vitro and in vivo. In the present studies, we have found that ORNs-d-M interferes with hemagglutinin (HA)–glycan interaction and suppress viral infection in host cells. HA–glycan interactions were evaluated to indirectly quantify the amount of influenza virus titer by an agglutination assay. Influenza virus infectivity was determined by TCID50 assay. The direct virucidal action of the complexes was evaluated by both cytopathic effects (CPE) reduction assay and cell MTT assay. We found that ORNs-d-M hinders interaction between HA and glycan. These complexes decreased the infectivity of influenza virus and had a direct virucidal action. ORNs-d-M reduces influenza virus infectivity, affecting the HA–glycan interaction in vitro. By suppressing the influenza viral infection, the ORNs-d-M can have direct virucidal action.
Triadenylate and its 3'-ep oxy an a logue were syn the sized by phosphotriester method in so lu tion. These com pounds are shown to ac cel er ate the mi gra tion of the bone mar row stem cells in do nor mice and their in clu sion into the spleen of re cip i ent mice upon syngenic trans plan ta tion in vivo. 2'-5'-Oligoadenylates and their de riv a tives de pend ing on their struc ture and con cen tra tion in flu ence apoptosis and pro lif er a tion of mice bone mar row cells in vi tro.
Вивчали противірусну дію 2',5''-триолігоаденілата та його похідних на модельних системах культури мишачих фібробластів L929 із вірусом вісповакцини, на культурі перевитих клітин тестикул поросяти з вірусом хвороби Ауєскі (штам «БУК-628») та референтним штамом вірусу трансмісивного гастроентериту свиней (штам «Пурдью-115»). Противірусну дію препаратів оцінювали за зниженням титру вірусу lg ТЦД-50 (тканинна цитопатична дія). За результатами проведеної роботи можна припустити, що 2\5'-триолігоаденілат та його похідні є перспективними противірусними препаратами, які діють на ДНКта РНК-вмісні віруси.
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